Hey. My 87 Sentra has a missfire problem. It starts as an intermittent miss when the engine is cold and progresses to a dead cylinder # 2 as it warms up. The spark plugs, wires, rotor and cap are all new, spark is good and strong. I can't find any vacuum leaks and compression is at 150psi across all cylinders. This miss is driving me crazy. I did the comp check on a cold engine, could something change as it warms up, like a valve adjusted too tight that seals when cold but leaks when hot be enough to missfire that cylinder? I believe the head gasket is fine because of the compression and no smoke out the exhaust and no coolant in the oil. Anyone got any ideas?